Cosine Rule - Finding Lengths

Cosine Rule - Finding Lengths
Cosine Rule - Finding Lengths
Cosine Rule - Finding Lengths
Cosine Rule - Finding Lengths

What's Included

  • Smart Notebooks Presentation
  • Interactive Excel File
  • Activ Inspire Flipchart
  • Lesson Plan
  • Microsoft PowerPoint Presentation
  • Differentiated Worksheet

Cosine Rule - Finding Lengths

Students learn how to derive and apply the Cosine rule to find missing lengths in triangles.  As learning progresses they are challenged to apply multiple formulae involving triangles to solve more complex problems.
Differentiated Learning Objectives
  • All students should be able to calculate an unknown length in a non right-angled triangle using the Cosine rule.
  • Most students should be able to calculate a magnitude of direction using bearings and a length in a non right-angled triangle using the Cosine rule.
  • Some students should be able to derive and apply the Cosine Rule to calculate unknown lengths in triangle shapes.
Free Downloads and Links
Proof of the Cosine Rule
Related Blogs
Solving Problems with Non-Right-Angled Triangles
Scheme of Work Link
Trigonometry - Non-Right-Angled Triangles Maths lessons to engage and inspire.
IMMEDIATE DOWNLOAD

You may also like...

Pythagoras' Theorem - Finding the Hypotenuse

Students learn how to derive and apply Pythagoras' Theorem to find the hypotenuse of right-angled triangles.  A...

Pythagoras' Theorem - Shorter Sides

Students learn how to calculate a shorter side of a right-angled triangle using Pythagoras' Theorem.  As learni...

Exact Trigonometric Solutions

Students learn how to solve trigonometrical equations with exact solutions using special triangles.   As learnin...

Mr Mathematics Blog

Teaching Mathematics for a Growth Mindset

Inspiring students to enjoy maths and feel the success that comes with attempting a difficult challenge is why I teach.  The feeling of success is addictive.  The more students experience it the more they want it and the further out of their comfort zone they are willing to go to get more of it.  Teaching […]

Equation of Straight Line Graphs

To find the equation of straight line graphs students need to calculate the gradient using two pairs of coordinates and the intercept which is the y value of where it crosses the vertical axis.  Examiner’s reports of past exam questions show students are more able to find the intercept of a straight line than they […]

Arithmetic and Geometric Sequences

Students learn how to generate and describe arithmetic and geometric sequences on a  position-to-term basis.  Learning progresses from plotting and reading coordinates in the first quadrant to describing geometric sequences using the nth term. This unit takes place in Term 4 of Year 10 and is followed by the equations of straight line graphs. Arithmetic […]